无法通过ngrok SSH到远程Linux

Question

The remote Linux computer is in an internal network and has no public IP address. So I installed ngrok.

ngrok tcp 22

ngrok by @inconshreveable (Ctrl+C to quit) Tunnel Status online
Version 2.0.19/2.0.17
Web Interface http://127.0.0.1:4040
Forwarding tcp://0.tcp.ngrok.io:36428 -> localhost:22
Connections ttl opn rt1 rt5 p50 p90
0 0 0.00 0.00 0.00 0.00

I checked that sshd is running.

At the local PC, I tried

ssh myuser@ngrok.com -p36428

which gave rise to

ssh: connect to host ngrok.com port 36428: Connection refused

Answer 1

You are connecting to the wrong destination address. The command should be

ssh myuser@0.tcp.ngrok.io -p36428

Notice the different hostname (ie 0.tcp.ngrok.io instead of ngrok.com ).

And generally you would want to put the user@hostname after all the options (eg -p36428 ), even though it doesn't generally cause any issues.